Math Lib: name signed versions of dist_to_plane_v3 explicitly

also add unsigned versions

2 files changed, 19 insertions, 4 deletions

diff --git a/source/blender/blenlib/BLI_math_geom.h b/source/blender/blenlib/BLI_math_geom.h
index 57cde5637d3..9962529e095 100644
--- a/source/blender/blenlib/BLI_math_geom.h
+++ b/source/blender/blenlib/BLI_math_geom.h
@@ -86,8 +86,11 @@ float dist_squared_to_line_segment_v2(const float p[2], const float l1[2], const
 float         dist_to_line_segment_v2(const float p[2], const float l1[2], const float l2[2]);
 void closest_to_line_segment_v2(float r_close[2], const float p[2], const float l1[2], const float l2[2]);
 
-float dist_squared_to_plane_v3(const float p[3], const float plane[4]);
-float dist_to_plane_v3(const float p[3], const float plane[4]);
+float dist_signed_squared_to_plane_v3(const float p[3], const float plane[4]);
+float        dist_squared_to_plane_v3(const float p[3], const float plane[4]);
+float dist_signed_to_plane_v3(const float p[3], const float plane[4]);
+float        dist_to_plane_v3(const float p[3], const float plane[4]);
+
 float dist_squared_to_line_segment_v3(const float p[3], const float l1[3], const float l2[3]);
 float         dist_to_line_segment_v3(const float p[3], const float l1[3], const float l2[3]);
 float dist_squared_to_line_v3(const float p[3], const float l1[3], const float l2[3]);
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c
index 54e3545a3f1..3d4cea70551 100644
--- a/source/blender/blenlib/intern/math_geom.c
+++ b/source/blender/blenlib/intern/math_geom.c
@@ -376,24 +376,36 @@ void closest_to_plane_v3(float r_close[3], const float plane[4], const float pt[
 	madd_v3_v3v3fl(r_close, pt, plane, -side / len_sq);
 }
 
-float dist_squared_to_plane_v3(const float pt[3], const float plane[4])
+float dist_signed_squared_to_plane_v3(const float pt[3], const float plane[4])
 {
 	const float len_sq = len_squared_v3(plane);
 	const float side = plane_point_side_v3(plane, pt);
 	const float fac = side / len_sq;
 	return copysignf(len_sq * (fac * fac), side);
 }
+float dist_squared_to_plane_v3(const float pt[3], const float plane[4])
+{
+	const float len_sq = len_squared_v3(plane);
+	const float side = plane_point_side_v3(plane, pt);
+	const float fac = side / len_sq;
+	/* only difference to code above - no 'copysignf' */
+	return len_sq * (fac * fac);
+}
 
 /**
  * Return the signed distance from the point to the plane.
  */
-float dist_to_plane_v3(const float pt[3], const float plane[4])
+float dist_signed_to_plane_v3(const float pt[3], const float plane[4])
 {
 	const float len_sq = len_squared_v3(plane);
 	const float side = plane_point_side_v3(plane, pt);
 	const float fac = side / len_sq;
 	return sqrtf(len_sq) * fac;
 }
+float dist_to_plane_v3(const float pt[3], const float plane[4])
+{
+	return fabsf(dist_signed_to_plane_v3(pt, plane));
+}
 
 /* distance v1 to line-piece l1-l2 in 3D */
 float dist_squared_to_line_segment_v3(const float p[3], const float l1[3], const float l2[3])